Oil industry represents an important part of the food industry.A large number of disposes of their wastes into the environment in enormous quantities,constituting a significant loss of resources and causing serious pollution problems.If any saving in energy waste can be coupled with a cheap form of waste utilization or treatment,it would further improve the benefits to the food industry.

In the activated sludge plant, the water to be treated is subject to the simultaneous contact with microorganisms and oxygen (air). These microorganisms convert the organic compounds in the raw water for the greater part into carbon dioxide,water ammonia and new activated sludge.the carbon dioxide generated is released into the atmosphere by aeration.The organic compounds are partly converted into micro-organisms,whilst the over-crowd is disposed off as excess sludge.Because of long standing aeration,the ammonia formed by the activated sludge will be converted into nitrite, and after that into nitrate(this process is called nitrification).Total nitrogen-reduction is requird by denitrification process, and it takes place under anoxic circumstance and uses the carbon in the wastewater to convert nitrite and nitrate into nitrogen gas, and it is released into the atmosphere.

2-System InformationHere is the information needed for waste water treatment plant design.2.1 design parameters The design of the system quoted here is based information obtained from client and experience.The client should inform us, if he feel that the design parameters, listed below, do not reflect actual situation:

2.3 plant performance Based on the given design data and our experience with similar wastewater we expected to meet your effluent requirements. PH:6.5-7.5Bod: 100mg/lCOD: mg/lSS: mg/lTN:<50mg/loil&grease:--mg/lsulfite:<1mg/lphosphorus:<5mg/l

the treated water compliance with environmental laws for discharged to sewer.By ahmed elsayed elshwadfyEnvironment and safety consulatant

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First for Consultancy and Environment

First for Consultancy and Environment firm has been established to offer environmental and management consultations in several fields which include a professional selection of permanent assigned team work, high university. In addition, highly qualified staff from abroad and engineers.